CHAPTER V 



SPRINGS 



Page 



Design of Helical Springs 



Spring Wire Specifications 122 



Design Stresses 128 



Torsional Moduli 130 



Allowable Stresses Based on Endurance 



Limits 131 



Natural Frequenc3r 132 



Formulas for Helical Springs 133 



Permissible Manufacturing Tolerances . . . 134 



Form for Design Calculations 136 



Standard Drawings for Springs 137 



Page 



Table of Wire Gages and Diameters, with 

 Their Squares, Cubes, and Fourth Powers 138 



Inspection and Testing of Springs 139 



Graphical Solution of Helical Spring 



Formulas 140 



Helical Spring Charts for Specified Ratio 



of Loads and Lengths 141 



Designs of Tension Spring Ends 144 



Flat Cantilever Springs, Graphical Design 



of 145 



Semielliptic Laminated Springs, Graphical 



Design of 148 



121 



